Question: What was the population of Aalborg on January 1, 2012?
Paraphrase: How many people lived in Aalborg on January 1, 2012?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q25410 p:P1082 ?s . ?s ps:P1082 ?obj . ?s pq:P585 ?x filter(contains(YEAR(?x),'2012')) }